Answer: B) You must have left the door unlocked.
Explanation for this question is being written.
Answer: A) Must have practiced.
Answer: D) Must have been watching.
Answer: A) Can't have.
Answer: A) Must have; past participle.
Answer: A) Must have forgotten.
Answer: A) Can't have left.
Answer: A) He must have done this because I saw him standing there.
Answer: A) Must have.
Answer: C) Must have been.
Answer: B) FALSE
Answer: C) Must have left.
Answer: B) Denied
Answer: B) MUST HAVE HAD TO.
Answer: B) Must have left.
Answer: A) Must have been.
Answer: C) Modal + relative past.
Answer: B) Must have taken.
Answer: A) Can't have been.
Answer: D) Must have revised.
Answer: A) To express concern or opinion about situations in the past.
Answer: A) Couldn't have been.
Answer: A) Don't have.
Answer: C) Are likely to have missed.
Answer: A) Must have smelled.
Answer: B) Can't have.
Answer: A) Can't have seen.
Answer: A) Must have been preparing.
Answer: A) True
Answer: D) He must have worked his socks off to get to the conference in time.
Answer: A) Could
Answer: C) Must have gone.
Answer: C) Must have.
Answer: A) You must have used too much sugar.
Answer: C) Must have stolen.
Answer: C) Can't have been.
Answer: B) Must have been.
Answer: B) Deductions about past events.
Answer: B) I'm sure that John's left.
Answer: A) Helping
Answer: B) Must have found out.
Answer: A) Couldn't recognize.
Answer: C) Must have missed.
Answer: A) Can't have rained.
Answer: A) Must have left.
Answer: A) High level of probability about a past event.
Answer: A) Must, must have.
Answer: D) Must have started.
Answer: B) Must
Answer: A) Can't have got in.